Abstract
Chrysopids are potential biological control agents of arthropods. Chysopid larvae prey on eggs, nymphs, larvae and pupa of coffee (Coffea arabica L.) pests. The objective of this study was to determine a sampling unit for Chrysoperla spp. eggs in coffee plants. We evaluated commercial fields of C. arabica cv. Catuaí 144 and determined the number of Chrysoperla spp. eggs on a pair of leaves located on a branch with the greatest leaf frequency. The third pair of leaves from the middle part of plant canopy was selected as the best location to sampling Chrysoperla spp. Sample unit validation showed a positive and significant relationship between the total number of eggs on the plant and the number of eggs on the 3rd to 5th pairs of coffee leaves. The selected sampling unit reduced the time required to sample Chrysoperla spp. by 71.7%. Sampling eggs of Chrysoperla spp. should focus on the abaxial surface of 3rd pair of coffee leaves.
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